Drill-guide.



A. G. NEAL.

DRILL GUIDE.

APPLIOATION FILED JUNE 15, 1909.

942,581. Patented Dec. 7, 1909.

El -I WITNESSES 1 INVENTOR UNTTED %TA.TE%

ALVIN C. NEAL, OE NEW YORK, N. Y.

DRILL-GUIDE.

eraser.

Specification of Letters IPatent.

Patented Dec. "2', 1999.

Application filed. June 15, 1909. Serial No. 502,214.

To all whom "it may concern:

Be it known that I, ALVIN G. NEAL, a citizen of the United States, and aresident of the city of New York, borough of Manhat tan, in the countyand State of'New York, have invented a new and Improved Drill- Guide, ofwhich the following is a full, clear, and exact description.

This invention relates to an improved device to be used to guide a drillin the twyer of a blast furnace when it is desired to remove the crustsor slag which have formed over the opening of the twyer.

The object of this invention is to provide a device which will be simplein construction, easily adjusted, inexpensive to manufacture, and at thesame time strong and durable. This and other objects, together with theconstruction and the combination of parts will be more fully describedhereinafter and particularly set forth in the claims.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views, and in which- Figure 1 is avertical section through the bosh of a furnace,taken at one of thetwyers; Fig. 2 is an enlarged, vertical section showing the details ofthe drill guide; Fig. 3 is a vertical end view of the cap; and Fig. 4Lis a vertical end view of the drill support, the other parts beingremoved.

Referring more particularly to the separate parts of the device, 1 and 2indicate the walls of a blast furnace which form a water-j acket betweenthem.

3 indicates the cylindrical pipe which forms a twyer opening in thewater-j acket.

Connected to the wall 2 in any suitable manner and juxtaposed to thetwyer opening there is provided a twyer a which may be of any suitableform and has a branch pipe 5 connected thereto, from which it receivesits supply of compressed air. The outer end of the twyer 1 is preferablyopen and flanged as at 6. A cap 7 is provided to close the opening inthe twyer 1 and has a flange 8 thereon which runs substantially parallelto the body of the cap 7 and is adapted to engage the flange 6 to holdthe cap securely to the end of the twyer. The cap 7 has a drill rodguide opening 9 which is preferably located centrally of the cap andalso substantially in the line with an opening 10 in a drill rod support11. Both the cap 7 and the support 11 have a plurality of smalleropenings through which are inserted suitable connecting rods 12 whichare preferably screw threaded on their ends and are adapted to beadjustably secured to the cap 7 and the support 11 by means of suitablenuts 13 and 1 1. These nuts 13 and 1a engage the support 11 and the cap7 from opposite sides, so as to prevent longitudinal motion in eitherdirection. The support 11 also has a plurality of large openings 15which permit the blast air from the supply pipe 5 to pass through intothe interior of the furnace.

The drill rod, which is indicated by the numeral 16, may be of anysuitable form and is inserted in the alined openings 9 and 10 and thussupported by the cap 7 and the support 11, whereby it may beconveniently operated to remove any incrustation formed over the twyeropening.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent:

1. In a device of the class described, the combination, with a twyer, ofa cap, a drill support, and connecting rods between said cap and saiddrill support.

2. In a device of the class described, the

combination, with a twyer, of a cap having an opening therein, of asupport having an opening therein substantially in a line with theopening in said. cap, and a plurality of connecting rods secured to saidcap and said support. 3. In a device of the class described, thecombination, with a twyer, of a cap having an opening therein, of aperforated support having an opening therein substantially in alinementwith the opening in said cap, and a plurality of connecting rods securedto said cap and said support.

4c. A drill guide comprising a cap having an opening therein, of asupport having a plurality of openings therein, one of which extends insubstantial alinement with the opening in said cap, and connecting rodssecuring said support to said cap.

5. A drill guide comprising a cap having an opening therein, a supporthaving a plurality of openings therein, one of which extends insubstantial alinement with the opening in said cap, and connecting rodsadjustably securing said support to said cap.

(5. In a device of the class described, the combination with a twyerhaving a flange on the end thereof, of a cap having an opening therein,a flange on said cap adapted to engage the flange in said tWyer, aperforated drill support having a plurality of openings therein, one ofWhich corresponds to the opening in said cap, and a plurality ofconnecting rods adjustably secured to said guide and said support.

In testimony whereof I have signed my name to th1s speclfieatlon 1n thepresence of 10 two subscribmg itnesses.

ALVIN C. NEAL.

Witnesses HORATIO VVHITING, PHILIP D. ROLLHAUs.

